Wrong KVM parameters: no kvm-img appears to be on the system to handle image creation; system cannot provide more than 2047MB to a guest machine.

[Janus]

Some terminal output:

INFO: Creating disk image [/home/username/.cache/testdrive/img/testdrive-disk-1Uw_Zp.img]...
INFO:testdrive.virt.kvm:Creating disk image [/home/username/.cache/testdrive/img/testdrive-disk-1Uw_Zp.img]...
sh: 1: kvm-img: not found
ERROR: Command failed
    `kvm-img create -f qcow2 /home/username/.cache/testdrive/img/testdrive-disk-1Uw_Zp.img 6G`
ERROR:testdrive.virt.kvm:Command failed
    `kvm-img create -f qcow2 /home/username/.cache/testdrive/img/testdrive-disk-1Uw_Zp.img 6G`
INFO: Running the Virtual Machine...
INFO:testdrive.virt.kvm:Running the Virtual Machine...
qemu: at most 2047 MB RAM can be simulated

After symlinking /usr/bin/qemu-img to /usr/bin/kvm-img AND selecting other amount of RAM to emulate it works.
Guess it's a misspelling.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: testdrive 3.26-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-34.60-generic 3.13.11.4
Uname: Linux 3.13.0-34-generic i686
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: i386
Date: Mon Aug 18 20:22:45 2014
InstallationDate: Installed on 2013-10-30 (292 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release i386 (20131016.1)
PackageArchitecture: all
SourcePackage: testdrive
UpgradeStatus: Upgraded to trusty on 2014-04-19 (120 days ago)

[Bruce Pieterse (octoquad)]

Altering the RAM fixes the qemu info message, but kvm-img is the main cause of the problem. This bug report mentions the same workaround: https://bugs.launchpad.net/ubuntu/+source/testdrive/+bug/1377487.